Infobright is not currently on our list of first-class connections, and we have no immediate plans to add it to that list. Please work with your sales representative at Tableau to provide feedback about how this impacts your use of Tableau products and how it may limit any plans to expand to broader use. This is the most effective way to provide a measure of priority along with your feedback.

No, we currently do not have an SDK. However we do have an experimental mechanism which improves certain operations Tableau performs via the MySQL Connector. This has allowed other customers to disable the "MySQL Query Path" setting in Infobright, and turning this off suppresses the MySQL optimizer in favor of the Infobright optimizer. The Tableau mechanism I'm referring to is described in this comment, though my instructions for Tableau Server were initially incorrect: http://community.tableau.com/thread/105047#128143